what is ip address and subnet mask

Today encountered a strange problem: the installation of a centos6.6, after the installation of the default DHCP to obtain the IP address, found to be able to surf the internet, get the IP address of 192.168.0.131/24, because it is installed server, so it

Java code/* determine whether it is an intranet IP */public static Boolean isinnerip (string IPaddress ){Boolean isinnerip = false;Long ipnum = getipnum (IPaddress );/**Private IP: Class A 10.0.0.0-10.255.255.255Class B 172.16.0.0-172.31.255.255Class C 192.168.0.0-192.168.255.255Of course, the 127 CIDR block is the loo

1. We right-click the win8.1 window "Start" menu as shown in the following picture, will pop up a small menu out.2. Click "Control Panel" in the Small pop-up menu.3. In the computer's control panel to find "Network and Internet" click to enter, as shown in the following figure.4. Then we will see in the interface to the right there is a "network and Sharing Center" click to enter, as shown in the following figure.5. After entering, click "Change adapt

From http://www.phpchina.com/bbs/thread-12239-1-1.htmlUse $ _ SERVER ["REMOTE_ADDR"] in PHP to obtain the Client IP AddressHowever, if the client uses a proxy server to accessThe IP address of the proxy server is obtained.To obtain the real IP

Php inserts an IP address into the database. is it necessary to convert the IP address before insertion? For later convenience. Such as Question !, For future convenience, php provides ip2long and long2ipmysql to provide INET_ATON and INET_NTOA php to insert

Php inserts an IP address into the database. is it necessary to convert the IP address before insertion? For later convenience. As the question! ------ Solution ------------------ since it is for convenience in future comparison,

Failure phenomenon: Intranet within the enterprise. One of the computer and services in the marketing department of a computer at the start, there are always two computer IP address conflicts. Changing the IP address of both computers is still a problem, and in the case of c

In wireless network applications, sometimes the IP addresses of wireless APs or wireless routes are often forgotten and cannot be accessed by a browser. Common solution, press the reset button to forcibly restore the factory settings. If you just forget the IP address, you can also scan through the LAN IP to find out t

preferences, set the network segment you want, in Win7 above environment to change the settings need to run this tool as an administrator; 4, click "OK" button to complete the configuration after the update is complete. Second, enter the virtual machine, set the virtual machine's network card as a fixed IP address; 1. After the virtual machine

In the TCP/IP protocol, three IP address zones are reserved for private addresses with the following address ranges:10.0.0.0/8:10.0.0.0~10.255.255.255172.16.0.0/12:172.16.0.0~172.31.255.255192.168.0.0/16:192.168.0.0~192.168.255.255So, go directly to the code:Public Static BooleanInternalip(String